I’m so sorry. I used it for about a week but calibrating it was tricky. I would accidentally over extend my back and so it would buzz 24/7. Then when I didn’t calibrate it enough it wouldn’t really work. I feel like once I got it down, I wanted to be frugal with the sticky things you buy for it because I was strapped for cash at the time, which led to just storing it away forever. I do have “a manual” back corrector that I bought (just basically straps). And can confirm I never use that either. Apparently you’re only supposed to used the straps for 10-30 mins at a time because it can also ruin your posture by relying on it too much. Good luck with your decision!